JSON for Modern C++ 3.8.0

accept
accept
accept
allocator_type
array
array_t
at
at
at
at
at
at
back
back
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
basic_json
begin
begin
binary
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end
end
erase
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erase
error_handler_t
exception
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find
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~basic_json
| ## ◆ swap() [1/6]
void nlohmann::basic_json::swap | ( | array_t & | other | ) |
| inline
  Exchanges the contents of a JSON array with those of other. Does not invoke any move, copy, or swap operations on individual elements. All iterators and references remain valid. The past-the-end iterator is invalidated. Parameters
  [in,out] | other | array to exchange the contents with
  Exceptions
  type_error.310 | when JSON value is not an array; example: `"cannot use swap() with string"`
  Complexity Constant. Example The example below shows how arrays can be swapped with `swap()`. 1 #include <iostream> 2 #include <nlohmann/json.hpp> 3 4 using json = nlohmann::json; 5 6 int main() 7 { 8 // create a JSON value 9 json value = {{"array", {1, 2, 3, 4}}}; 10 11 // create an array_t 12 json::array_t array = {"Snap", "Crackle", "Pop"}; 13 14 // swap the array stored in the JSON value 15 value["array"].swap(array); 16 17 // output the values 18 std::cout << "value = " << value << '\n'; 19 std::cout << "array = " << array << '\n'; 20 } Output (play with this example online):
      value = {"array":["Snap","Crackle","Pop"]}
      array = [1,2,3,4]
  The example code above can be translated with
      g++ -std=c++11 -Isingle_include doc/examples/swap__array_t.cpp -o swap__array_t
Since version 1.0.0 Definition at line 21676 of file json.hpp.

nlohmann::basic_json::array_t
ArrayType< basic_json, AllocatorType< basic_json > > array_t
a type for an array
Definition: json.hpp:16326
nlohmann::basic_json::value
ValueType value(const typename object_t::key_type &key, const ValueType &default_value) const
access specified object element with default value
Definition: json.hpp:19564
nlohmann::basic_json::array
static basic_json array(initializer_list_t init={})
explicitly create an array from an initializer list
Definition: json.hpp:17559
nlohmann::json
basic_json<> json
default JSON class
Definition: json.hpp:2774